Lloyd; I make up 30 syringes in advance and put them in a bucket and pull one out for each hive. Re-fill between yards. I get 50 ml syringes for about 50 cents. If you want to improve the accuracy of the sprayer technique add a 'T' between the hose and the applicator wand and screw on a pressure gauge so you can monitor pressure at the wand. I like Solo brand sprayers as they are all polyethylene with removable tips and an in-line filter screen just behind the tip to reduce clogging. They are translucent so you can see the fluid levels drop. They make 1 gal, 2 gal., and backpacks. You can substitute any ag sprayer tip and each sprayer comes with a solid stream tip that shoots a perfect stream for oxalic. The folks that apply pesticides to test plots with hand held or backpack sprayers use compressed air to deliver consistent pressure. Randy's technique to keep a graduated cylinder handy to calibrate with should keep the application accurate. I like to put a few sticky boards down on the bottom boards during oxalic application. I am amazed (and gratified)at the mite drop in December after getting alcohol wash counts down to 1-2/300 bees 5 months earlier. Bill Lord Louisburg, NC *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html Guidelines for posting to BEE-L can be found at: http://honeybeeworld.com/bee-l/guidelines.htm